commit 87c7bec7fc3377b3873eb3a0f4b603981ea16ebb
author Christoph Hellwig <hch@infradead.org> Wed Sep 14 14:08:26 2011 +0000
committer Alex Elder <aelder@sgi.com> Tue Oct 11 21:15:09 2011 -0500
tree abe143d8f76e4d95f2158134913b10fc9be6def1
parent 1da2f2dbf2d2aaa1b0f6ca2f61fcf07e24eb659b

xfs: fix buffer flushing during unmount

The code to flush buffers in the umount code is a bit iffy: we first
flush all delwri buffers out, but then might be able to queue up a
new one when logging the sb counts.  On a normal shutdown that one
would get flushed out when doing the synchronous superblock write in
xfs_unmountfs_writesb, but we skip that one if the filesystem has
been shut down.

Fix this by moving the delwri list flushing until just before unmounting
the log, and while we're at it also remove the superflous delwri list
and buffer lru flusing for the rt and log device that can never have
cached or delwri buffers.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Amit Sahrawat <amit.sahrawat83@gmail.com>
Tested-by: Amit Sahrawat <amit.sahrawat83@gmail.com>
Signed-off-by: Alex Elder <aelder@sgi.com>